fix: remove voice.py/ai_operator_config.py host bind-mounts

These files now come from the call-center image (git-tracked as of
digiops/call-center 13ba8f8) instead of a host override that bypassed
CI. The same mounts also existed uncommitted in docker-compose.override.yml
on this host -- removed there too (not part of this commit, see local
working tree).

docker-compose.aimaq.override.yml

@@ -2,7 +2,7 @@ services:
   asterisk-bridge-service:
     environment:
       AI_VOICE_ENABLED: "1"
-      AI_VOICE_RUNTIME_SERVICE_URL: "http://92.38.48.166:8002"
+      AI_VOICE_RUNTIME_SERVICE_URL: "http://ai-voice-runtime-service:8000"
       SALES_VOICE_RUNTIME_ENABLED: "1"
       ASTERISK_CALLCONTROL_ENABLED: "1"
       ASTERISK_WEBRTC_ENABLED: "1"